By Max Hunder and Pavel Polityuk
KYIV (Reuters) -Russia&nbsp;said it had broken through two fortified defence lines in&nbsp;Ukraine's east, while Western allies pledged to ramp&nbsp;up&nbsp;military aid to better arm Kyiv as it prepares for a counter-offensive.
Bolstered by tens of thousands of reservists drafted in December,&nbsp;Russia&nbsp;has intensified attacks across southern and eastern&nbsp;Ukraine&nbsp;in recent weeks, and a major new offensive is widely expected as the first anniversary of its invasion nears.
"The enemy's offensive continues in the east, (with) round-the-clock attacks," Ukrainian Deputy Defence Minister Hanna Malyar said.
"The situation is tense. But our fighters are not allowing the enemy to achieve their goals and are inflicting very serious losses," she wrote on the Telegram messaging app on Wednesday.
Earlier, the&nbsp;Russian Defence Ministry said Ukrainian forces had retreated in the face of&nbsp;Russian operations in the Luhansk region, although it gave no details and Reuters was not able to verify this and other&nbsp;battlefield&nbsp;reports.
"During the offensive ... the Ukrainian troops randomly retreated to a distance of&nbsp;up&nbsp;to 3 km (2 miles) from the previously occupied lines," the ministry said on Telegram.
"Even the more fortified second line of defence of the enemy could not hold the breakthrough of the&nbsp;Russian military."
The ministry did not specify in which part of Luhansk the offensive took place. The Luhansk and Donetsk regions make&nbsp;up&nbsp;the Donbas,&nbsp;Ukraine's industrial heartland, now partially occupied by&nbsp;Russia&nbsp;which wants full control.
In Kyiv, the capital's military administration said six&nbsp;Russian balloons that may have contained reconnaissance equipment were shot down after air raid sirens blared.
"The purpose of launching the balloons was possibly to detect and exhaust our air defences," it said on the Telegram messaging app.&nbsp;Russia&nbsp;did not immediately comment.
BAKHMUT ATTACKS
Russia's main effort has been an artillery and ground onslaught on the city of Bakhmut, in Donetsk.
Russian forces have launched attacks on several settlements, including Paraskoviivka on the northern approaches to Bakhmut, over the past day, Ukrainian military analyst Oleh Zhdanov said.
Russian attempts to advance on two other settlements north of Bakhmut were repelled, he added in a YouTube video.
"Things are very difficult for our forces there as&nbsp;Russian troops are being sent into the area en masse," Zhdanov said.
Maksym Zhorin, a military analyst and former commander, told Ukrainian Radio NV that the&nbsp;Russians were attacking Opytne and Klishchiivka, villages on the southern approaches to Bakhmut.
There was also heavy fighting in Krasna Hora, to the north of Bakhmut, where the Ukrainians had suffered losses, he added.&nbsp;
"The city can be supplied and the injured can be evacuated. We can maintain our defence for a long time yet," he said.
The General Staff of the Ukrainian Armed Forces, in its evening report, said&nbsp;Russian forces had fired on more than 15 towns and villages near Bakhmut, including the city itself.
Donetsk regional Governor Pavlo Kyrylenko posted pictures and video of an apartment building littered with rubble that he said was destroyed in the city of Pokrovsk, southwest of Bakhmut, killing three people.
Bakhmut's capture would give&nbsp;Russia&nbsp;a stepping stone to advance on two bigger cities, Kramatorsk and Sloviansk further west in Donetsk, which would revive Moscow's momentum ahead of the Feb. 24 anniversary of the invasion.
MILITARY EQUIPMENT
NATO&nbsp;countries are ramping&nbsp;up&nbsp;production of artillery munitions as&nbsp;Ukraine&nbsp;is burning through shells faster than allies can make them, the alliance said.
"Things are happening, but ... we need to step&nbsp;up&nbsp;even more, because there is a big need out there to provide&nbsp;Ukraine&nbsp;with ammunition,"&nbsp;NATO&nbsp;chief Jens Stoltenberg told reporters after a two-day meeting of alliance defence ministers in Brussels.
Ukraine&nbsp;has received billions of dollars in military aid, with the United States committing more than $27.4 billion in security assistance since the conflict began.
European Union foreign policy chief Josep Borrell urged countries to join Germany in sending tanks.
Britain said it and other European nations would provide military equipment including spare parts for tanks and artillery ammunition via an international fund, with an initial package worth more than $241 million.
U.S. Defense Secretary Lloyd Austin said&nbsp;Ukraine&nbsp;had a very good chance of taking and "exploiting" the initiative on the&nbsp;battlefield&nbsp;this year.
Russia&nbsp;calls the invasion a "special military operation" against security threats and has cast deliveries of heavy weapons to&nbsp;Ukraine&nbsp;as proof that the West is escalating the war.
Kyiv and its allies call&nbsp;Russia's actions a land grab.
Senior U.S. officials have previously advised&nbsp;Ukraine&nbsp;to hold off with a major offensive until the latest supply of U.S. weaponry was in place and training had been provided.
"We have to ensure that this spring it is truly felt that&nbsp;Ukraine&nbsp;is moving towards victory,"&nbsp;Ukraine's President Volodymyr Zelenskiy said in an evening address.
(Reporting by Max Hunder, Pavel Polityuk, Caleb Davis, Sabine Siebold, Ron Popeski and David Ljunggren; Writing by Costas Pitas and Himani Sarkar; Editing by Stephen Coates)

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